Cooling system.



E. P. CULVER.

COOLING SYSTEM.

APPLICATION FILED DEC- II. l9l4.

1,16%,1 7%. Patented Jan. 11, 1916.

llVl/E/VTUR Edward PCulver ,4 TTOR/VEYS EDWARD PEOK CULVER, OF SCHENEGTADY, NEW YORK.

COOLING SYSTEM.

Specification of Letters Patent.

Patented Jan. M, 19165.

Application filed December 17, 1914. Serial No. 877,775;

To aZZ whom it may concern Be it known that I, EDWARD P. CULVER, :1 citizen of the United States, and a resident of Schenectady, in the county of Schenectady and State of New York, have invented a new and Improved Cooling System, of which the following is a full, clear, and eX- act description.

My invention relates to cooling systems for internal combustion engines, and has reference more particularly to the method of circulating the cooling medium.

The invention is characterized by the com bination of the thermosiphon system of cooling with the force system of cooling.

The object of the invention is to provide a simple and efiicient cooling system for internal combustion engines, which systemwill require but a small volume of cooling medium and, consequently, will be of small capacity, although the engine will be perfectly cooled.

lVith the above and other objects in view, the nature of which will more fully appear as the description proceeds, the invention consists in the novel construction, combination and arrangement of parts as herein fully described, illustrated and claimed.

In the accompanying drawings, forming part of the application, similar characters of reference indicate corresponding parts in all the views, and Figure l is a diagrammatic view, partly in section, of an internal combustion engine provided with my cooling system; Fig. 2 is a similar view showing the cooling system slightly modified; and Fig. 3 is a further modification of my cooling system.

Referring to the drawings, an internalcombustion engine 4: is provided with a thermo-siphon cooling jacket 5, the end 6 of which jacket is connected to the bottom of a reservoir 7, the outlet 8 of the thermo siphon jacket being connected to the top of the said reservoir. A radiator 9 of any suitable construction, preferably cellular, is used as the same has a large cooling area, and which radiator is connected to the reservoir 7 by a conduit 10 leading from the top of the radiator to the bottom of the reservoir. A force pump 11 has its inlet connected to the bottom of the radiator 9, and its outlet pipe 12 projecting into the reservoir '1. The pipe 12 adjacent the top of the reesrvoir is provided with an elbow 13 adapted to direct the fluid pumped'toward'the bottom of the reservoir and, consequently, toward the Conduit 10 connecting the reservoir to the radiator.

It will be noted that a cooling medium, 6. 9., Water, Will circulate up the cylinder jacket 5, over to the reservoir 7, down and up into the cylinder jacket again, this circulation being due to the thermo-siphon action; andit must be remarked that it is not accomplished by means of the pump used. The reservoir 7, however, is kept entirely filled with the cooling medium by the action of the pump 11. T he said pump also causes a forced circulation through the radiator, thus permitting the use of the regular small amount of cooling medium in the chicient cellular radiators. With my system the reservoir? will be maintained full as long as there is any'cooling liquid in the radiator 99, consequently, a perfect thermosiphon circulation is obtained with a small volume of cooling medium; thus, the motor gets the benefit of an even, economical temperature under the action of the thermosiphon circulation. In the ordinary thermosiphon circulation the radiator must be kept filled, at least up to the outlet from the cooling jackets 5, consequently the same requires frequent replenishment, due to the evaporation. Furthermore, the thermo-siphon circulation requires a radiator of large volume, with free tubes, so ample cooling medium may be circulated under the slight difference .of weight of the hot and cold liquids. Consequently though my reservoir adds some weight and takes up room, it Will in reality be less cumbersome than the ordinary thermo-siphon system "of circulation.

In Fig. 2 a modified structure of the circulating system is shown. In this case the jacket 5 is similarly connected to the reservoir 7, but conduit 10' connects the top of the reservoir to the top of the radiator 9',

and the outlet 12' from the pump 11 extends only to the bottom of the reservoir; so that in this case the cooling medium coming from the jacket. into the reservoir intermixes with the cooling medium fed by the pump from the radiator; but in both cases the pump maintains the reservoir full so as to obtain a perfect thermo-siphon circulation.

In Fig. 3, the system is similar to that disclosed in Fig 2, but the reservoir 7 is provided with a perforated partition 14 so as to separate the currents carried by the thermosiphon circulation and by the forced circulation, the inter-mingling between the two columns being obtained through the perforations in the partition 14.

If desired the reservoir may be made part of the cylinder. casting of the engine, form- I ing part of the jacket, so to say. For marine service the radiator, of course, would not be used, as the pump would supply the reservoir with water direct from the lake or river, and the overflow from the. reservoir be carried overboard. It is self-evident that my system can be used in connection with stationary combustion engines also, with slight modifications in arrangement, th

principle remaining the same. From the foregoing description, taken draw-- ture shown is merely illustrative and 'that such changes may be made as are within the scope of the appended claims.

Having thus described my invention, I claim as new and desire to secure by 'Letters Patent:

1. In a cooling system of the class described, a cylinder cooling jacket having an inlet adjacent the bottom thereof and an outlet adjacent the top hereof, a reservoir connected to the inlet and the outlet of said jacket, a radiator, a conduit from the radi- ,ator to the reservoir, a pump, and a conduit from the radiator to the pump and from the pump to the reservoir, whereby the cooling medium from the radiator is forced into the reservoir substantially as and for the pur- 'pose set forth.

2. In a cooling system of the class described a cooling jacket having an inlet at the bottom and an outlet at thetop thereof, a reservoir for the cooling medium, the top of said reservoir, being connected to the outlet of the jacket and the bottom of the-reservoir to the inlet of the jacket, a radiator Cooies ofthis patent may. be obtained for into which thereservoirhas an overflow, and a pump for supplying said reservoir with the cooling medium at the bottom from the bottom of the radiator.

3. In a cooling system, a cylinder cooling jacket, a reservoir for the cooling medium connected to the jacket to cause a thermosiphon circulation through the jacket and reservoir, a radiator in connectionwith the reservoir, and means for displacing the cooling medium from the radiator to the reservoir directly.

- 4. In a cooling system, a thermo-siphon circulation comprising a cooling jacket, a.

reservoir for the cooling medium connected to the jacket, so that a 'thermo circulation is created between the jacket andgthe reservoir, a'radiator, and a pump exterior to the thermo-siphon circulation for displacing the cooling medium from the radiator to the reservoir directly.

5. In a cooling system, a cylinder cooling jacket, a reservoir for'the cooling medium,

connected with the jacket so that the heat supplied to the jacket causes a circulation of the cooling medium .through the jacket 'and reservoir, and a pump for displacing the cooling medium from the radiator to the reservoir directly.

. 6. In a cooling system, a cylinder coolingjacket a reservoir for the cooling medium connected with the jacket at the top and bottom thereof, said reservoir having the top thereof above the top of the jacket, an overflow from the top of the reservoir, and a pump connected to the overflow for fo'rcing the cooling medium to the reservoir.

.Infa cooling system, 'the' combination of' thethermo-siphon circulation system including a reservoir, a radiator exterior to said system,-and a pump exterior to the system for supplying the cooling medium from the radiator directly to the reservoir of the thermo-siphon system. 5

In testimonywhereof I have signed my 'name to this specification in the presence of two subscribing witnesses.

EDYVARD PEGK GULVER. Witnesses CHAUNCEY VVHITMYRE, GEORGE GIrFoRD.

five cents each, -by addressing the Commissioner. of Patents, Washington, D. C. 

